This song debuted in the eighth Pokémon movie the week before its television debut.

Battle Frontier (Japanese: バトルフロンティア lit. Batoru Furontia) is the fourth opening theme song of the Japanese Advanced Generation series of the Pokémon anime, and the ninth total opening for the Pokémon television anime.

It debuted in AG135, replacing Pokémon Symphonic Medley. Its singer, 髙屋亜希那 Akina Takaya, is a relatively unknown artist. It debuted at the same time as a new ending, Pokémon Counting Song. The instruments-only version replaced the instrumental version of Advance Adventure in episode 135 in the Japanese preview of the next episode. It was replaced by Spurt!.

It was also used as the Pokémon Sunday ending from PS053 to PS059 and was then replaced by YEAH!.

Opening animation

OP Text

The mysterious creatures of this planetPocket Monsters..."Pokémon" for short!Now, the story of a boy, Satoshi, and PokémonTheir meetings, adventures,and battlesAre about to begin!

Synopsis

This section is incomplete.Please feel free to edit this section to add missing information and complete it.

Ash and Pikachu are in a field running toward the sun and they jump. The gang are in a forest playing happily, except May. There are flashbacks of Mimey, Delia Ketchum, Professor Oak, Professor Birch, Tracey, and Misty holding an Azurill. Ash's Pokémon are seen using their attacks and they all take a photo. Scott appears in a car and the Frontier Brains, except for Brandon, appear. Then, it showcases the characters' Pokémon. Team Rocket waves. The rest of the opening has been changed multiple times.

Pokémon Sunday ending animation

The next group of animations are the same as in the main opening (Ash and Pikachu running through the field, through the pan shot of Ash and all of his Pokémon). However, the differences in these animations are that ending credits replace the ones used in the opening. Also, the scene of Scott waving while driving past is replaced by a pan shot of all of the Frontier Brains. The animation sequence following this include portions of the first Frontier Brain battle between Ash and Noland, which involved Charizard and Noland's Articuno. After this, the normal animations resume, starting from the sequence involving Brock chopping up lettuce and cooking rice, and May throwing a Poké Ball. The Team Rocket sequence prior to AG152 (with Weavile) remains intact. This is followed by the Mew and Lucario flyby animation, as was the case in the first version of this opening. Unlike the original ending though, the group silhouette is replaced with the Frontier Brain reveal.